Hi Paul,

Do we have a cross reference chart showing Torque and Rpm. ?
I want to increase the power of the 13B in my Oscar SK90 racer,
\but there is a limit to the torque the gearbox will handle.

cheers,

Russ Ward

Torque and RPM are mathematically related.

 It is a law of physics.

It is not just an idea it is the LAW!! :-)

1. HP  = torque times RPM divided by 5252

1a. HP = T * RPM / 5252

2. 5252 * HP = T * RPM

3.. 5252 * HP / RPM = T

3a. T =  5252  * HP / RPM

Increase the RPM and the gear box will live with more horse power.
Use equation 1a.

What RPM are you running now? Do you have a p-port?
The peak torque is a function of the intake runner length.
Shorten the runners and the same torque will move up
the RPM curve.  14 or 13 inches long will be about right.

What is an Oscar SK90? Do you have a picture?

Paul Lamar

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